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游客2023-11-04  49
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答案                             Vertical Farms
    By the year 2050, nearly 80% of the earth’s population will have resided in urban centers. An estimated 109 hectares of new land will be needed to grow enough food to feed them, if traditional farming practices continue as they are practiced today. So, an entirely new approach to farming must be invented, employing cutting edge technologies. The concept of indoor farming is not new.
    What is new is the urgent need to scale up this technology to accommodate a fast growing number of people. Vertical farming was thus invented. Rice on the seventh floor, wheat on the twelfth, and enough food within an eighteen-story tower to feed a small city of 50,000.Vertical farms must be cheap to construct and safe to operate. If successfully implemented, they will offer the promise of urban renewal, sustainable production of a safe and varied food supply, and the eventual repair of ecosystems that have been sacrificed for horizontal farming.
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